This week, Australia’s House of Representatives narrowly passed a carbon tax, sending the bill to the country’s Senate, where observers say it is almost certain to pass. Supporters say Australia’s setup would have several advantages over Europe’s carbon-trading system, including a fixed price for the first three years while the fledgling system gets going, which could allow Australia to claim it is the world leader on climate legislation.

Debt-wracked Greece is launching a plan—with Germany’s help—to attempt to boost its economy out of recession by building huge solar power installations. “Project Helios,” named after the Greek god of the sun, is designed to attract 20 billion euros in foreign investment—and a large portion of the electricity produced may leave the country, headed to Germany.

In preparation for 2012—which the United Nations has named the Year of Sustainable Energy for All—the International Energy Agency released its first assessment of the cost of ending energy poverty. The price tag: $48 billion a year—about 3 percent of the yearly global energy investment, and about five times as much as is spent now trying to bring energy to the world’s poor.

Expanding electricity to about 1.5 billion people who lack it now would add less than 1 percent to the world’s emissions, the report estimated, and the spread could be driven by the private sector, with the proper incentives from governments, said U.N. Secretary-General Ban Ki-moon.

Notwithstanding the retreat from nuclear power in Germany, Switzerland, and perhaps Japan, the world is still headed for a nuclear renaissance, said a report by Britain’s Royal Society. However, the report argued there should be more emphasis on controlling proliferation of nuclear materials and better storage of spent fuel to avoid accidents like that at Fukushima.

A new bill in Berkeley, California, is questioning the city’s long-time stance as a “nuclear free zone,” which uses no nuclear power and lets no nuclear weapons pass through it. But one of its city council members says the 1986 law causes more problems than it is worth and should be repealed.